A nervous system can alter activities in its target cells in muscles and glands because
A)they are electrically coupled by gap junctions.
B)the target cells have receptor proteins for the signals released by the nervous system.
C)the nervous system releases signals into the blood to control the target cells.
D)the target cells that become disconnected from the nervous system rapidly die.
E)the target cells each have an internal neural network connected to the nervous system.

Question

Quizplus · Accepted Answer

The nervous system releases signals, called neurotransmitters, which bind to receptor proteins on the target cells. This binding can either excite or inhibit the target cell, leading to altered activity in muscle or gland cells.

A Nervous System Can Alter Activities in Its Target Cells